1. Environmental drivers of tropical forest snake phenology: insights from citizen science
- Author
-
Jesus, Letízia M. G., Guedes, Jhonny J. M., Moura, Mario R., Feio, Renato N., and Costa, Henrique C.
- Subjects
climate change ,circular analyses ,Atlantic Forest ,citizen science ,venomous snakes ,phenology ,local collectors - Abstract
Museum specimens and citizen science initiatives are valuable sources of information on how anthropogenic activities affect biodiversity and how species respond to rapid global change. Although tropical regions harbor most of the planet’s biodiversity, investigations on species’ phenological changes are heavily biased towards temperate regions. Such unevenness in phenological research is also taxonomically biased, with reptiles being the least studied group among tetrapod species regarding animal phenology. Herein we used long-term time series data to investigate environmentally driven changes in the activity pattern of tropical forest snakes. We gathered natural history collection and citizen science data for 25 snake species (five venomous and 20 non-venomous) from an Atlantic Forest region in southeastern Brazil. Using circular mixed-effects models, we investigate whether snake activity patterns followed the variation in environmental variables over a decade. Our results show that the activity pattern of Atlantic Forest snakes was seasonal and largely driven by average temperature and relative humidity. Since snakes are ectothermic animals, they are particularly sensitive to temperature variations, especially at small scales. Moreover, relative humidity can affect snake seasonal activities through physiological constraints and/or prey availability. Most specimens were registered during the rainy season, with highly venomous snakes (lanceheads and coral snakes) emerging as the most abundant taxa. We highlight the importance of citizen science and natural history collections in better understanding biodiversity. Furthermore, our data obtained from local collectors underscores the need environmental education programs and collaboration between researchers and local decision-makers to raise awareness and reduce conflicts between people and snakes in the region. Methods All analyses in this study were performed in the software R v. 4.0.2. Raw data and R-code to replicate the findings of this study are as follow: 1. Rscript_SnakeSeasonalActivity.R 2.rawdata.csv 3.INMET_SE_MG_A510_VICOSA_2009_2018.csv 4.SnakeBiteData.csv The R-script is commented by the authorsand contains all code used to analyze data tables, get summary stats, perform the models,and create the figures in the manuscript. Acknowledgements We thank the environmental police officers, firefighters, security guards, and other local collectors who brought snakes to MZUFV along the years. JJMG is supported by a PhD scholarship from Coordenacão de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). MRM acknowledges support from São Paulo Research Foundation (FAPESP) for grants proc. 2021/11840-6 and proc. 2022/12231-6.
- Published
- 2023
- Full Text
- View/download PDF